When I read oriental medicine theory of ""we are what we eat" haha, I remember I was told to eat more neck bone soup when I broke my bones and people where I'm from eat brain, hoping to become more intelligent lol.
Harbaugh's theory is crazy, chicken is a nervous animal, that's how we get out nervousness from seems indeed ridiculous. Yet I've heard a lot of conspiracy theories about eating chicken meat, like why you should never wash chicken before cooking... so many mysteries about chicken...
It's almost the only meat I eat nowadays, not so creative like the most "I don't eat red meat" people, I think I'll stick with it and won't become a vegetarian anyway.
Bone/neck broth has some minerals and a lot of collagen so does aid a healing process by providing the building blocks necessary
Brain on the other hand is an awesome source of omega-3's on which it operates
So, as crazy as it sounds, this actually makes sense